Curtain holdback



FIG. 1 is a front isometric view of a curtain holdback showing our new design

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Broken lines have been used in the drawings for screw holes which do not form part of the claimed design. 

CLAIM The Ornamental design for a curtain holdback, as shown and described. 